Device for measuring a pulsating variable in an internal combustion engine

US5069063A · kind A · utility

Inventors

• Martin Chrobaczek · Stuttgart, DE
• Helmut Denz · Stuttgart, DE
• Andreas Roth · Karlsruhe, DE
• Hans-Peter Heim · Stuttgart, DE

Key dates

• Filing date: Jul 11, 1990
• Grant date: Dec 3, 1991
• Expiry date: Jul 11, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01L23/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for detecting a pulsating variable by fixed-angle dual sampling with slight filtering in which the pulsating variable is filtered and/or damped in such a manner that a quasi-sinusoidal variation is obtained. The signal thus obtained is a crank-angle-synchronous signal sampled twice per duration of one period. From these two measurement values, a current mean value of the pulsating variable is determined once per duration of the period.